#TITLE_ALTERNATIVE#

• Main Author: (NIM : 23108317); Pembimbing Utama : Dr. Ir. Zainal Abidin, TARWAJI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/17376
• Institution: Institut Teknologi Bandung

In the industrial world, especially electrical generation power plant industry, there are many rotation machines needed with the stepping of turbine dimension. For big capacity of power plant, within one inline turbine machine can be consisted of 6 serial rotors coupled with 5 fixed and rigid mechanical couplings. <br /> <br /> <br /> <br /> <br /> In this thesis, it has been performed the experiment of two rotor-shafts coupled by flexible and rigid coupling which has been available in Dynamics Laboratory PAU-IR ITB. These rotor-shaft systems are asumed rigid and symetric, while their supports are asumed flexible and designed within lateral direction anysotrophic characteristics. For capturing the complete overview, in every rotor-shaft configuration would be performed the orbital measurements, starts from low speed under first critical speed up to far a way speed beyond second critical speed within 8 cases of rotation speed. These orbit experiments has been performed by measuring the movement of the rotor-shaft system supports in the vertical and horizontal direction by using proximity sensors. <br /> <br /> <br /> <br /> <br /> From the comparation of the experimental orbit form by the theoretical orbit form, in the several rotor configuration, we can see that the form and the orientation of rotor whirling orbits have the same form with the theoretical orbit form at several rotor rotation speed. Such as the case, for two rotor-shafts coupled by flexible coupling, the changing of the natural frequency is not significantly from their natural frequencies of each single rotor-shaft before coupled. Otherwise, for two rotor-shafts coupled by a rigid coupling, each rotor characteristic tends to make their new natural frequencies and uniform whirling orbit forms as like as one rotor-shaft. Where in this thesis, it can also be found that the natural frequency of the 2nd Rotor-Shaft is changed significantly and also the changing of orbit direction orientation.